[from our Own Correspondent.]
Lynchburg, Oct. 18.
--The enemy fell back beyond Bristol Friday night.
On the Virginia and Tennessee Railroad they burned five bridges.
They threw the yard engine and tender over into the turn-table at one of the stations, and tore up a half-mile of the track this side of Bristol, and destroyed a few old cars of the East Tennessee and Virginia Railroad.
At Bristol they broke up two locomotives, destroyed five car-loads of salt and a number of old cars.
On their retreat they destroyed all the wheat and corn, fencing, killed the cattle, and played destruction generally with the country through which they passed.
It is thought something of importance occurred in the neighborhood of Knoxville which caused their sudden retreat.
The burned bridges on the Va., and Tenn. Railroad are all within five miles of Bristol, and can soon be rebuilt. B. 